Review Question - QID 210765

A 17-year-old boy presents to his primary care physician for eye pain. The patient states that it has been going on for the past 3 days and has been steadily worsening. He recently suffered a superior orbital fracture secondary to playing football without a helmet that required no treatment other than refraining from contact sports. The patient's past medical history is non-contributory. His temperature is 98.7°F (37°C), blood pressure is 112/68 mmHg, pulse is 65/min, respirations are 11/min, and oxygen saturation is 99% on room air. A physical exam demonstrates pain and swelling inferior to the patient's eye near the lacrimal duct. When pressure is applied to the area, expressible pus is noted. Cranial nerves 2-12 are grossly intact. Which of the following is the most likely diagnosis?